— 8 —
SECTION 3
ELECTRICAL ADJUSTMENTS
Notes:
1.
The adjustments should be performed in the order given. (As a
general rule the transmitter section (TMR-IF630R) adjustments
should be completed before performing the headphones section
(MDR-IF630R) adjustment.)
2.
The adjustment and measurements should be performed for both
L-ch and R-ch unless otherwise indicated.
3.
L-ch adjustment should be completed before performing R-ch
adjustment
4.
Supply 9 V dc to the transmitter section (TMR-IF630R) and 2.4 V
dc to the headphones section (MDR-IF630R) as the power voltage.
HEADPHONES SECTION 0 dBV=315 mVrms
Note:
1.
On adjusting the headphones section (MDR-IF630R), use the
transmitter (TMR-IF630R) as a jig.
[ TUNING ADJUSTMENT ]
Preparation:
1.
Feed a signal to jig (TMR-IF630R) and connect a power supply
to DC IN jack (J4).
2.
Supply DC 2.4 V between VCC and GND on the RX BASE
board.
3.
Set RV301 (VOL) on the RX BASE board to the maximum
positon.
4.
Set SW301 on the RX BASE board to OFF (NORMAL).
Connection:
Adjustment Procedure:
1.
Connect the distortion meter to L+/L– (L-ch) and R+/R– (R-ch).
2.
Adjust with L204 (L-ch) and L104 (R-ch) on the RX BASE
board to minimize the reading on the distortion meter.
L-ch
L204
minimum
R-ch
L104
minimum
AUDIO IN B
jack (J1)
1kHz 315mV (
|
10dBV)
600
¶
Trans-
mitter
jig
ATT
AF OSC
RX BASE board
L+/L–
R+/R–
+
+
–
100
µ
F/16V
distortion meter
Adjustment Location :
–RX BASE BOARD (Conductor side)–
L204
Tuning adjustment
(L-ch)
R+
(R-ch)
R-
L+
(L-ch)
L-
(VCC)
(GND)
L104
Tuning adjustment
(R-ch)
